Design and Analysis of Microstrip Low Pass and Bandstop Filters

Abstract

In this paper a simple approach of designing the microstrip low pass and bandstop filter is presented. The microstrip stub based low pass filter with 2.4 GHz and attenuation of more than 60 dB at 4 GHz frequency is designed. The bandstop filter is also designed with notch characteristics at 2.4 GHz frequency. The fractional bandwidth of designed filter is estimated to be 30% with 117 dB of attenuation is recorded at notch frequency of 2.4 GHz in SIR based bandstop filter topology. The bandstop filter is implemented using coupled line structure as well as step impedance resonator techniques. The filters are designed on Roger RC40003C substrate. The design and analysis of filter with its layout and EM simulation is accomplished using Agilent ADS software. These filters can be used in front end transceiver systems, antennas, and modern wireless communication systems.

Design and Characterization of a Traveling-Wave Antenna for Millimeter Applications in the Sub-THz Band

“…Te antenna designed in this work is similar to a flter, mainly the impedance-skipping flter in which we have made hollows in the middle. Te diference lies in the design technique used; for microwave flters, Kuroda identities and the Richard transformation are used to determine the dimensions of the stubs to be connected in order to carry out the design, whereas for the antenna, the transmission line equations are generally used to obtain the dimensions of the antenna [15,16]. Also, for the feed, a traveling wave antenna is fed from one port and the other is connected to earth via a matched impedance, and for a microwave flter, both ports need to be fed.…”

“…Much work on 6G antenna measurements has been ongoing in recent years, but most of these eforts encounter manufacturing problems because at sub-THz frequencies, the antennas are very small to manufacture [6][7][8]. Traveling wave antennas could therefore overcome this thorny manufacturing problem because of their large dimensions [9][10][11][12][13][14][15]. Tese antennas use discontinuities in the transmission lines to radiate, and they also have wide bands but generally have low gains.…”

Design and Optimization of Butterworth and Elliptic Band Pass Filters in 5G Application

“…This filter was easy to implement and more compact compared with its coupled line structure equivalent. The designed filter can be used in wireless communication systems [16]. At [2019], a Butterworth 5 th order bandpass filter was designed based on a quarter-wave resonator in ISM (2.4GHz -2.48GHz) band with a fractional bandwidth of 50% for a center 2.1GHz frequency.…”